You can thank NPH and How I Met Your Mother...........NPH is the man.......
ARTICLE 26:
"A bro will, in a timely manner, alert his bro to the existence of a girl fight." A Bro must never hesitate before communicating the possibility of fisticuffs between two humans of the female variety [[HENCEFORTH "GIRL FIGHT"]], in an effort to make possible and probable that another Bro or Bros can partake in observation. A timely manner is open to interpretation based on the initial Bro's viewing and processing of the potential feminine conflagration. Said Bro must use any and all methods of media distribution at his disposal, including but not limited to: telecommunications, elbow nudging, fiber optics, the Broney express, and postcards. If an informed Bro is unable to witness the girl fight firsthand, the spotter Bro is responsible for documenting and relating details of the girl fight via pictures, video*, or barring any other reasonable method, interpretive dance and/or pantomime. Tabling Bro obligations to witness a XX chromosomal scuffle is not only condoned, but encouraged, and in some cases, required. Please refer to the Brobligation rubric as elucidated in AMENDMENT 83: "The REALLY hot sister and other hump trumps." * SEE ZaBroder film